CN101894600B

CN101894600B - Process for preparing copper-clad aluminum laminated busbar

Info

Publication number: CN101894600B
Application number: CN2010102259012A
Authority: CN
Inventors: 谢建新; 刘强; 刘新华; 兰占军
Original assignee: YANTAI FISEND BIMETAL CO Ltd
Current assignee: YANTAI FISEND BIMETAL CO Ltd
Priority date: 2010-07-08
Filing date: 2010-07-08
Publication date: 2012-07-04
Anticipated expiration: 2030-07-08
Also published as: CN101894600A

Abstract

The invention provides a process for preparing a copper-clad aluminum laminated busbar. Aluminum on a core part and copper in a clad layer are compounded into a copper-clad aluminum compound body first, and the ratio of the area of copper-clad layer is 15 to 50 percent; and the preparation process comprises the following steps: (1) drawing; (2) rolling; (3) drawing; (4) performing finish rolling process; (5) annealing; and (6) drawing, wherein the drawing speed is 2 to 35m/min, and the reduction of the area of a single pass is 4 to 18 percent until the size of the busbar is qualified. The preparation process has the advantages that: the first-pass process of the invention is the drawing process in which the pass of a drawing die is designed and the die is assembled independently; because the clad materials subjected to drawing are combined well, the cracking phenomenon of the copper-clad layer is avoided in the process of cogging, and the combination between the aluminum and the copper is strengthened; therefore, the prepared copper-clad aluminum laminated busbar has a smooth surface and high dimension precision, and the mechanical property meeting related requirements; the preparation process is high in efficiency and wide in promotion; and by designing the process flow, the drawing die and the rolling pass reasonably, the problem that the clad materials are difficult to be subjected to pressure processing is solved.

Description

A kind of preparation technology of copper-clad aluminum laminated busbar

Technical field

The invention belongs to the double metallic composite material field, relate in particular to a kind of preparation technology of copper-clad aluminum laminated busbar.

Background technology

Copper-clad aluminum laminated busbar is composited by core aluminium and coating layer copper; Its blank adopts the direct compound forming technique of horizontal casting to process; The patent No. is that 200810057668 patent discloses " a kind of high-performance cooper-coated aluminum rectangle section compound conductive bus row and preparation technology thereof ", and its processing step is: adopt the direct composite forming copper cladding aluminum composite blank of horizontal casting; With the finishing drawing again of the common as required flat rolling of copper cover aluminum blank, or adopt the flat rolling of being with edger roll; Reach at 70%～90% o'clock in the rolling total relative reduction of multi-pass, the copper cover aluminum compound conductive bus bar is carried out low temperature intermediate annealing; Compound conductive bus bar to after the annealing carries out groove rolling or drawing.This processing technology, deflection control does not with great difficulty make coating layer break during cogging, and equipment disposition and inappropriate technology can cause defectives such as copper-clad coating cracking, copper aluminium decohesion, busbar side and plane coating thickness be variant in following process.

Summary of the invention

The objective of the invention is to solve the deficiency in the above-mentioned background technology, and a kind of method that can prepare high performance copper-clad aluminum laminated busbar is provided.

Technical scheme of the present invention is achieved in that a kind of preparation technology of copper-clad aluminum laminated busbar, at first is combined into the copper cover aluminum complex by core aluminium and coating layer copper, and coating the long-pending ratio of copper aspect is 15～50%, and its preparation technology comprises the steps:

1. drawing: blank diameter 46～48mm; Four passages of drawing; Preceding two passage area reductions control to 3～15%; Back two passage area reductions control to 2～15%, and four total area reductions of passage control to 10～45%, and four road drawing die passes progressively become oblate transition by ellipse;

2. rolling: use common flat rolling, the mill speed scope is 10～40m/min, and first reduction in pass is 15%～40%; Second reduction in pass is that the 11%～35%, the 3rd passage is used rolling on edge technology, and drafts is 5～25%;

3. drawing: drawing speed controls to 2～35m/min; The first road drawing makes the reduced down in thickness amount control to 3～8mm; The second road drawing reduced down in thickness amount controls to 2～6mm, and the width reduction amount controls to 2～4mm, and the total reduction of sectional area after two passage drawings controls to 3～20%;

4. finish-rolling process: through 3 passage finish rolling, flat rolling is with flat rolling in first road, and drafts controls to 5～10%, and through the row rolling on edge, drafts controls to 2～8mm in rolling groove in second road, and flat rolling is with flat rolling in the 3rd road, and deflection controls to 2～8%;

5. annealing: heating rate controls to 12～30 ℃/min, and annealing temperature is 220～450 ℃, and annealing time is 0.5～2h, and the type of cooling is with the stove natural cooling;

6. drawing: drawing speed is 2～35m/min, and the single pass area reduction is 4%～18%, to qualified size.

The invention has the beneficial effects as follows: first road process using drawing process among the present invention; Design the drawing die pass voluntarily and join mould, owing to combine after the clad material drawing well to coat copper layer fracture phenomena when having solved cogging; And strengthened the combination between the copper aluminium; Become a kind of any surface finish, dimensional accuracy height and the satisfactory copper clad aluminum wire of mechanical property, process efficiency is high, and generalization is wide; Through appropriate design technological process, drawing mould, rolling groove, solved the difficult problem of clad material pressure processing.

Description of drawings

Fig. 1 is four road drawing die passes of the present invention.

Embodiment

Copper cover aluminum compound conductive bus bar and preparation technology thereof among the present invention are a kind of processing methods of double metallic composite material, and the copper cover aluminum compound conductive bus bar is composited by core aluminium and coating layer copper; Coating the long-pending ratio of copper aspect is 15～50%, for circular and oval cogging method is: blank diameter 46-48mm, four passages of drawing; Preceding two passage area reductions control to 3～15%; Back two passage area reductions control to 2～15%, and the area reduction that four passages are got off total controls to 10～45%, four road drawing die passes realized oval to oblate excessively; Help the back rolling mill practice, the vary in diameter of blank such as Fig. 1;

Next step processing step is: with the blank of cogging with common flat rolling to suitable dimension, the mill speed scope is 10～40m/min, rolling scope is: the first passage relative reduction is 15%～40%; The second road drafts controls to 11%～35%, and the 3rd road adds rolling on edge technology one, and it is good that side copper aluminium is combined, and deflection is 5～25%.

Handle through drawing process afterwards; Drawing speed controls to 2～35m/min, and the first road drawing mainly makes and realizes reduction on the thickness, and reduction controls to 3～8mm; The second road drawing is all reductions to some extent on thickness and Width; Reduction controls to 2～6mm on the thickness, controls to 2～4mm on the Width, and the total reduction of the sectional area of two passages controls to 3～20% after the drawing.

The follow-up finish-rolling process that carries out again.Finishing pass is three roads, and flat the rolling in first road is with flat rolling, and deflection controls to 5～10%; Second road is warp row rolling on edge in rolling groove; Drafts controls to 2～8mm, and flat the rolling in the 3rd road is with flat rolling, and deflection controls to 2～8%; This moment, the busbar thickness range was 5.5～10.8mm, and width range is 52～83mm.

Afterwards the copper cover aluminum compound conductive bus bar is carried out intermediate annealing process, heating rate controls to 12～30 ℃/min, and annealing temperature is 220～450 ℃, and annealing time is 0.5～2h, and the type of cooling is with the stove natural cooling.

Finishing operation is an end product drawing technology, and the finishing drawing velocity interval is 2～35m/min, and the single pass area reduction is 4%～18%.

Claims

1. the preparation technology of a copper-clad aluminum laminated busbar at first is combined into the copper cover aluminum complex by core aluminium and coating layer copper, and coating the long-pending ratio of copper aspect is 15～50%, it is characterized in that preparation technology comprises the steps:

3. drawing: drawing speed controls to 2～35m/min; The first road drawing makes the reduced down in thickness amount control to 3～8m m; The second road drawing reduced down in thickness amount controls to 2～6mm, and the width reduction amount controls to 2～4mm, and the total reduction of sectional area after two passage drawings controls to 3～20%;